Portable compressor outfit



Dec. 11), 1929.

F. D. HOLDSWORTH PORTABLE COMPRESSOR OUTFIT Filed July 28, 1927 2 Sheets-Sheet [722162230 r.- l raiflfioldsworiia Dec. 10, 1929. F. D. HOLDSWORTH 3 PORTABLE COMPRESSOR OUTFIT Filed July 1927 2 Sheets-Sheet a In v e 2??0 r: PreaZD 0021252007272.

by AWL 4- Patented Dec. 10, 1929 UNITED;

FREDD. HOLDSWORTH, OF GLAREMONT, NEW HAMPSHIRE, ASSIGNOR TO SULLIVAN MACHINERY COMPANY, A CORPORATION OF MASSACHUSETTS PORTABLE COMPRESSOR OUTFIT Application .filed July 28,

My invention relates to portable compressor outfits.

One object of the invention is to devise an improved arrangement of the different units of a compressor outfit on a portable base frame. Another object is to provide a portable compressor outfit of verylow overall height particularly adapted for use in mines where the head room is limited. A still to further object is to provide an arrangement of the units in a portable compressor outfit with a view to keeping the overall width as low as possible and at the same time maintaining a minimum overall height. A more specific 5 object is to provide a novel arrangement of the elements in a portable compressor outfit, wherein the cylinders of the compressor are positioned horizontally and transversely I of the frame. Other objects and advantages 50 will, however, hereinafter subsequently apear. p In the accompanying drawings I have shown for purposes of illustration one form which my invention may assume in practice.

In these drawings,- Fig. 1 represents a plan view of the compressor outfit mounted on a mine trackway.

Fig. 2 is a vertical section through the outfit on the line 2-2 of Fig. 1, the running gear so being shown in elevation.

Fig. 3 is a view in side elevation of the portable compressor outfit.

Fig. 4 is an end elevation looking from the left end of Fig. 3 and showing the mine trackway in section. I

In this illustrative embodiment of my invention I have shown a frame member 1 for carrying the elements of the compressor mechanisnnthe frame member 1 being provided with side flanges 2 and end flanges 3.

The frame member 1 has secured thereto bearing members 4, in which are mounted the truck axles 5 carrying the truck wheels 6. This construction brings the supporting level of the frame very close to the level of the axles. Other arrangements for securing the wheels to the frame element may,however, be substituted for the one which has been illustrated and described without departing from the principles of my invention. Suitable cou- 192?. Serial NO. 209,156.

pling elements 7 may be secured to the frame in any desired manner, preferably directly to the end flanges 3. A motor 8, preferably of standard design, is secured to the floor 9 of the frame member by suitable brackets 10;, and is preferably positioned not midway between'the sides of the frame, but offset from such a middle position. in this instance disposed longitudinally of the frame and connected directly to the crank shaft 11 of the compressor 12' through a suitable coupling element 13. If it is desired,

however, to reduce the speed of the compressor below that of the motor, any suitable reduction gearing may be mounted between the motor and compressor crank shaft. The crank case 14 of the compressor has afbase 15 with lugs or a flange 16 for attachment to the floor The motor shaft is,

ofthe frame. This crank case is provided with i a removable cover 17, and withgmeans for the attachment of the compressor cylinders 18 in whlch the pistons 19 reciprocate.

In the em bodiment illustrated herein two cylinders are.

provided, both being arranged on the same side of the frame 1. This provldes a more compact arrangement than havingone of the cylinders extending from each side of the crank caseflvhich may be an important consideration if it is desired to reduce the overall width of the outfit to a minimum. However, in mines where the width is not such an important consideration, the crank case may be so designed as to accommodate an extra pair of cylinders on the oppositeside ofthe crank shaft to increase the capacity. The usual connecting rods 20 and crank shaft counterbalance weight 21 are illustrated. Alr is discharged from the compressorthrough a line 22 to a cylindrical receiver tank 23 whichis mounted alongside the motor with its longest dimension extending longitudinally of the frame. 'As shown moreclearly in Fig. 4c, the

receiver tank is secured to the frame by strap I members 24 which have one end attached at 25 to a side flange of the frame and the other end attached to a member 26 which is secured to the frame by bolts 27 in the manner illusext-end above the high pointon the motor,

v aheads and dischargevalvesmay also be sim but obviously the receiver tank capacity may be varied by increasing or decreasing its length, the overall length of the outfit being a comparatively unimportant matter unless curves are sharp. v

The type of compressor illustrated is usually provided with a liquid cooling system which, in this instance, includes a" low radia= 1 tor 28 mounted on one end of the frame, preferably alinement with the motor 8. The

' cylindersof the compressor are provided-With cooling jacketsi29 and if desired the cylinder ilarly jacketed. A small circulating pump 30 is mounted on the frameadj acent'the radia tor and is driven by a belt 31 from the motor shaft; This pump circulates the cooling medium from the jackets around the compressor cylinders and cylinder head through a pipe 32 to the top of the radiator, through the radiator and circulating pump, back to the compressor'cylinders' through the line 33. It will thus be seen that I have provided a very compact arrangement of the essential units ofa compressor outfit in Which theoverall heightjhas been kept down to such an extent thatfit is. determined by the high point of tlie driving motorwhen a standard motor is employed; At the same time itwill-be o bserved that the width of the entire outfit has been reduced to a minimum and that any desired increase in'capacitymay be easily taken care of by a proportionate increase in'the length ofthe 'outfit withoutin any'way' increasingthe overall heiglit'or' the Width.

While Ihave in this application specifi cally described one form -which my'inven- 1 tion may assume in practice, it will be understood that his form of the same is shown for purposesof illustration and that the invention may be modified and embodied in various other forms without departing from its spirit or the scope, of the appended'claims.

What I claim as new and desireto secure r by Letters-Patent .is c

1. In 'a portable compressor outfit, a porta-blebase frame, a motor mounted thereon offset fromja position midway between the sides of said frame with the motor shaft extending parallelfwith the c'enterline of the frame, a

by having horizontal cylinders extending transversely of said frame, and a. receiver tankmounted alongside said motor with ts longest dimension extending longitudinally of said frame.

5 3. Inaportable compressor outfit, a portable base frame, a motor mounted thereon, "a

horizontally disposed compressormounted on SELlCl frame and connected to sald motor, and a receiver tank mounted alongside said motor and parallel to the motor shaft, no part of saidoutfit projecting upwardly from saidframehigher than said motor.

4; In aporta'ble compressor outfit, a

, wheeled base frame movable over a trackway,

a motor mounted thereon,- a horizontal com pressor mounted thereon having a crank shaft extending parallel to said trackway at one side of the longitudinal center line of said frame, said crank shaft being driven by said motor, and a receiver tank mounted alongside saidmotcr with its longest dimension extending longitudinally of said frame.

5. In a portable compressor outfit, a portable base frame, a horizontalcompressor mounted'jthereon having a crankcase offset to one side ofvsaijd frame and cylindersextending horizontally transversely toward the other sideof said frame, a driving motor] mounted on said frame, and a receiver tank mounted onsaid frame wholly at the last mentioned side of the central longitu'dinalverti cal plane of the frame, the overall dimension of said compressor in a direction parallel to the cylinders determining the overall idth of the outfit. i '7 l 6. In a portable compressor I wheeled base frame movable over a tra k" way, a motor carried thereby with its shaft.

extending longitudinally and offset toward 6 one side of said'frame, a compressor having a crankcase mounted on the same side of said frame as said motor and cylinders extending toward the other side of 'saidlframe, and a receiver tank mounted on. sald other ,Sld fldlaf cent said motor] 7. In a portable compressor outfit, wheel ed base frame movable over a trackway, a motor carried thereby and offset towardone side of said frame, a compressor having a crank;

, case mounted on thesame side ofsaid frame,

as said motor and cylinders extending [toward the other s de of sa1dframe,and areceiver tank mounted on said other side adjacent said motor, the overall height of saidoutfit being determined by the combined height of said frame. v r I 8. In a portable compressor outfit, a porta ble base frame having mounted thereon-a motor, a compressor driven therebyhaving v j motor and said Wheeled base a horizontal' jacketed cylinder extending; transversely of Sflltl frame, areceiver tank mounted alongside said motor with its longest dimension extending longitudinally of said frame, a radiator ,at one end of said frame, a'punip driven by said motor, and

connections completing a closed cooling sysf;

tem including said radiator, said pump and the jacket of said compressor cylinder.

9. In a portable ompres or outfit, a portisoi;

able base frame having mounted thereon a motor with its shaft extending longitudinally of said base frame, a compressor driven thereby having a crank shaft extending longitudinally of said base frame and a horizontal jacketed cylinder extending transversely of said frame, a cylindrical receiver tank mounted alongside said motor extending longitudinally of said frame, a radiator at one end of said frame, a pump driven by said motor, and piping connecting said radiator and pump, said pump and cylinder jacket and said cylinder jacket and radiator.

10. In a portable compressor outfit, a wheel mounted base frame, a horizontal compressor mounted thereon having a crank shaft extending longitudinally of said frame and a horizontal cylinder extending transversely thereof, a driving motor mounted on said frame ofiset from a position midway between the sides thereof, and a receiver tank mounted alongside said motor, the overall dimension of said compressor in a direction parallel to the cylinder thereof determining the overall width of the outfit.

11. In a portable compressor outfit, a wheel mounted base frame, a horizontal compressor mounted thereon having a crank shaft extending longitudinally and offset toward one side of said frame and a cylinder extending horizontally transversely thereof, a driving motor mounted on said frame having its shaft alined with said compressor crank shaft and operatively connected to drive the same,

and a cylindrical receiver tank disposed longitudinally of said frame and mounted alongside said motor, the overall dimension of said compressor in a direction parallel to the cylinder thereof determining the overall width of In testimony whereof I aflix my signature.

FRED D. HOLDSWORTH. 

